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dev-platform@mozilla.org
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Swarup Ukil
May 15
Intent to prototype: Advanced CSS attr() function
Summary: The basic CSS attr() function has been supported since Firefox 1; however, support for it
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Intent to prototype: Advanced CSS attr() function
Summary: The basic CSS attr() function has been supported since Firefox 1; however, support for it
May 15
Edgar Chen
May 13
Intent to prototype & ship: Pointer Lock unadjustedMovement
Summary: Element.requestPointerLock() gains a PointerLockOptions dictionary argument with a boolean
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Intent to prototype & ship: Pointer Lock unadjustedMovement
Summary: Element.requestPointerLock() gains a PointerLockOptions dictionary argument with a boolean
May 13
Leo Tenenbaum
May 12
Intent to Prototype: EditContext
Currently, the only ways to handle the diverse range of text input methods out there (IME composition
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Intent to Prototype: EditContext
Currently, the only ways to handle the diverse range of text input methods out there (IME composition
May 12
Kershaw Jang
May 12
[dev-platform] Intent to Prototype and Ship: Happy Eyeballs v3
Summary: We are introducing Happy Eyeballs v3, a new connection-establishment algorithm that replaces
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[dev-platform] Intent to Prototype and Ship: Happy Eyeballs v3
Summary: We are introducing Happy Eyeballs v3, a new connection-establishment algorithm that replaces
May 12
Emilio Cobos Álvarez
,
Nicolas Chevobbe
2
May 12
Intent to prototype and ship: CSS image(<color>) function (and use it for light-dark() images)
There's some minor work needed for DevTools (making sure that we show the color swatch for the
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Intent to prototype and ship: CSS image(<color>) function (and use it for light-dark() images)
There's some minor work needed for DevTools (making sure that we show the color swatch for the
May 12
Daniel Minor
,
Emilio Cobos Álvarez
2
May 7
Intent to prototype and ship: Error.stackTraceLimit
On 5/7/26 3:19 PM, 'Daniel Minor' via dev-pl...@mozilla.org wrote: > This originated as
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Intent to prototype and ship: Error.stackTraceLimit
On 5/7/26 3:19 PM, 'Daniel Minor' via dev-pl...@mozilla.org wrote: > This originated as
May 7
Kagami Rosylight
May 7
Intent to ship: Notification.actions
As of 2026-04-22 (I'm late, sorry) I intend to turn on web notification actions support by
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Intent to ship: Notification.actions
As of 2026-04-22 (I'm late, sorry) I intend to turn on web notification actions support by
May 7
Nishu Sheth
May 6
Automated NixOS Symbol Scraping
Hi all, I'm happy to share that we now have automated scraping of NixOS symbol information in
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Automated NixOS Symbol Scraping
Hi all, I'm happy to share that we now have automated scraping of NixOS symbol information in
May 6
Donal Meehan
May 6
Weekly Firefox dot release schedule starting with Firefox 151
Hi everyone, We're planning a release process change to improve how quickly and predictably we
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Weekly Firefox dot release schedule starting with Firefox 151
Hi everyone, We're planning a release process change to improve how quickly and predictably we
May 6
Sunil Mayya
2
May 6
[dev-platform] Intent to Prototype: No-Vary-Search HTTP Caching Extension
Summary: Today, two URLs that differ only in query parameters irrelevant to the response content (
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[dev-platform] Intent to Prototype: No-Vary-Search HTTP Caching Extension
Summary: Today, two URLs that differ only in query parameters irrelevant to the response content (
May 6
Sunil Mayya
2
May 6
[dev-platform] Intent to Prototype: Speculation Rules - Same-Origin Prefetch
Summary: The Speculation Rules API allows pages to declare hints about likely future navigations
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[dev-platform] Intent to Prototype: Speculation Rules - Same-Origin Prefetch
Summary: The Speculation Rules API allows pages to declare hints about likely future navigations
May 6
Olivier (shtrom) Mehani
May 6
Lando can now show you your own queue of jobs
Hi all, A little heads up that we landed and deployed https://bugzilla.mozilla.org/show_bug.cgi?id=
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Lando can now show you your own queue of jobs
Hi all, A little heads up that we landed and deployed https://bugzilla.mozilla.org/show_bug.cgi?id=
May 6
Ryan Hunt
May 4
Intent to prototype: WebAssembly JS-Promise-Integration
Summary: WebAssembly JS-Promise-Integration (JS-PI) allows sync WebAssembly code to use async Web
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Intent to prototype: WebAssembly JS-Promise-Integration
Summary: WebAssembly JS-Promise-Integration (JS-PI) allows sync WebAssembly code to use async Web
May 4
Jan-Niklas Jäschke
May 4
Intent to prototype: Opaque Ranges
Summary: Opaque Ranges represent a live span of text within a form control's value, such as <
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Intent to prototype: Opaque Ranges
Summary: Opaque Ranges represent a live span of text within a form control's value, such as <
May 4
Keith Cirkel
May 4
Intent to Ship: field-sizing:content
Summary: Support for `field-sizing:content`, allowing form controls to be sized based on their
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Intent to Ship: field-sizing:content
Summary: Support for `field-sizing:content`, allowing form controls to be sized based on their
May 4
Kanaru Sato
Apr 28
Intent to prototype and ship: animation property of AnimationEvent and TransitionEvent
Summary: Add animation property to AnimationEvent and TransitionEvent. This prop has the
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Intent to prototype and ship: animation property of AnimationEvent and TransitionEvent
Summary: Add animation property to AnimationEvent and TransitionEvent. This prop has the
Apr 28
Florian Quèze
Apr 24
mochitest failures in CI are now retried within the same job
A recent patch (bug 2032038) changed how mochitest failures are handled in CI: - Failed mochitests
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mochitest failures in CI are now retried within the same job
A recent patch (bug 2032038) changed how mochitest failures are handled in CI: - Failed mochitests
Apr 24
Gregory Mierzwinski
Apr 22
Telemetry Alerting Beta Now Open
Hello, We're excited to announce that the telemetry alerting beta is now open to everyone! Simply
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Telemetry Alerting Beta Now Open
Hello, We're excited to announce that the telemetry alerting beta is now open to everyone! Simply
Apr 22
Emilio Cobos Álvarez
, …
Dave Townsend
9
Apr 21
PSA: Node ownerGlobal changes
Sounds good. I don't want to bikeshed too much but I'm not sure `relevantGlobal` really
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PSA: Node ownerGlobal changes
Sounds good. I don't want to bikeshed too much but I'm not sure `relevantGlobal` really
Apr 21
Adam Vandolder
Apr 17
Intent to prototype & ship: Fullscreen Keyboard Lock API
Intent to prototype & ship: Fullscreen Keyboard Lock API Summary: The Fullscreen Keyboard Lock
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Intent to prototype & ship: Fullscreen Keyboard Lock API
Intent to prototype & ship: Fullscreen Keyboard Lock API Summary: The Fullscreen Keyboard Lock
Apr 17
Frederik Braun
Apr 17
Firefox Security & Privacy Newsletter Q1 2026
Welcome to the Q1 2026 edition of the Firefox Security & Privacy Newsletter. Security and privacy
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Firefox Security & Privacy Newsletter Q1 2026
Welcome to the Q1 2026 edition of the Firefox Security & Privacy Newsletter. Security and privacy
Apr 17
Greg Stoll
Apr 16
Intent to ship: Add-On-Gated Web Serial
As of Firefox 151, I intend to turn the Web Serial API on by default on Windows, Mac, and Linux. It
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Intent to ship: Add-On-Gated Web Serial
As of Firefox 151, I intend to turn the Web Serial API on by default on Windows, Mac, and Linux. It
Apr 16
Olivier (shtrom) Mehani
Apr 16
`mach try` now uses the new lando instance
Hi all, tl;dr: No action needed, this should be transparent. Do report any issue, and bypass with `
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`mach try` now uses the new lando instance
Hi all, tl;dr: No action needed, this should be transparent. Do report any issue, and bypass with `
Apr 16
Eemeli Aro
Apr 15
Intent to protoype: Importing text modules
Summary: Add a new 'text' value for JavaScript's import type attribute, with which a file
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Intent to protoype: Importing text modules
Summary: Add a new 'text' value for JavaScript's import type attribute, with which a file
Apr 15
Vincent Hilla
Apr 14
Intent to ship: Document Picture-in-Picture API
As of Firefox 151, I intend to enable the Document Picture-in-Picture API by default. It was
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Intent to ship: Document Picture-in-Picture API
As of Firefox 151, I intend to enable the Document Picture-in-Picture API by default. It was
Apr 14
Jonathan Kew
Apr 13
Intent to implement & ship: CSS container style queries
As of Firefox 151, I intend to turn CSS Container Style Queries on by default for all platforms. It
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Intent to implement & ship: CSS container style queries
As of Firefox 151, I intend to turn CSS Container Style Queries on by default for all platforms. It
Apr 13
Andrew Halberstadt
2
Apr 12
[NOTICE] FirefoxCI Scheduled Downtime with Trees Closed (Sun April 12th)
The scheduled migration is complete. Please reach out in #Firefox-CI on Matrix if you're seeing
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[NOTICE] FirefoxCI Scheduled Downtime with Trees Closed (Sun April 12th)
The scheduled migration is complete. Please reach out in #Firefox-CI on Matrix if you're seeing
Apr 12
Keith Cirkel
Apr 12
[dev-platform] Intent to Prototype & Ship: shadowrootslotassignment attribute
Summary: Support for the `shadowrootslotassignment` attribute, mapping to `slotAssignment` on `
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[dev-platform] Intent to Prototype & Ship: shadowrootslotassignment attribute
Summary: Support for the `shadowrootslotassignment` attribute, mapping to `slotAssignment` on `
Apr 12
David Shin
Apr 10
Intent to Prototype & Ship: `position-anchor: normal`
Summary: `position-anchor: normal` allows authors to use anchor positioning without having to specify
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Intent to Prototype & Ship: `position-anchor: normal`
Summary: `position-anchor: normal` allows authors to use anchor positioning without having to specify
Apr 10
David Lawrence
Apr 7
Engineering Effectiveness Newsletter (Q1 2026 Edition)
Welcome to the Q1 edition of the Engineering Effectiveness Newsletter! The Engineering Effectiveness
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Engineering Effectiveness Newsletter (Q1 2026 Edition)
Welcome to the Q1 edition of the Engineering Effectiveness Newsletter! The Engineering Effectiveness
Apr 7
